# SSC Spring Engineering vs Edge Smart Keypad

The clearest difference is review sentiment: SSC Spring Engineering at 50% against Edge Smart Keypad's 0%. SSC Spring Engineering also leads on rating (4.6 vs 2.9). Edge Smart Keypad's advantage is update cadence (every 2 months vs every 6 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SSC Spring Engineering holds the better App Store score, 4.6 against 2.9. Both are backed by a comparable volume of ratings — 26 and 9 respectively. Written reviews point the same way: 50% of SSC Spring Engineering's written reviews are positive against 0% of Edge Smart Keypad's.

SSC Spring Engineering ships an update every 6 months, Edge Smart Keypad every 2 months. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SSC Spring Engineering | Edge Smart Keypad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (26 ratings)](https://appshunter.io/ios/app/ssc-spring-engineering/id1438112209/reviews)** | [2.9 (9 ratings)](https://appshunter.io/ios/app/edge-smart-keypad/id1468623089/reviews) |
| Number of ratings | **26** | 9 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 38 MB | 18 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Service Spring Corporation](https://appshunter.io/developer/342694497) | [Security Brands, Inc.](https://appshunter.io/developer/828448530) |

## What reviewers say

### SSC Spring Engineering

[App page](https://appshunter.io/ios/app/ssc-spring-engineering/id1438112209)

This utility app assists with spring engineering calculations, including conversions, new designs, and comparisons. It helps determine spring and drum specifications for various applications, such as rolling steel doors, and calculates lifting capacities.

**Highlights:** Spring conversion, New spring engineering, Drum specification comparison, IPPT spring calculation, Rolling steel door spring design, Approximate pull calculation, Maximum lift capacity determination

**Features:** macOS Compatibility

**In-app purchases:** none


### Edge Smart Keypad

[App page](https://appshunter.io/ios/app/edge-smart-keypad/id1468623089)

This utility app allows users to manage access control and perform administrative tasks on Edge devices via Bluetooth. It also functions as a remote control for these devices.

**Highlights:** Bluetooth connectivity, Access control management, Administrative tasks, Remote control functionality

**In-app purchases:** none


## Frequently asked questions

### Is SSC Spring Engineering free?

SSC Spring Engineering is free to download, with no in-app purchases.

### Is Edge Smart Keypad free?

Edge Smart Keypad is free to download, with no in-app purchases.

### Which has better reviews, SSC Spring Engineering or Edge Smart Keypad?

SSC Spring Engineering is rated higher. SSC Spring Engineering averages 4.6 out of 5 from 26 ratings, while Edge Smart Keypad averages 2.9 from 9 ratings.

### Do SSC Spring Engineering or Edge Smart Keypad have ads?

Neither SSC Spring Engineering nor Edge Smart Keypad shows ads.

### Which is updated more often, SSC Spring Engineering or Edge Smart Keypad?

SSC Spring Engineering ships an update every 6 months, and Edge Smart Keypad every 2 months. Most recently, SSC Spring Engineering was updated on September 29, 2026 and Edge Smart Keypad on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*